|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Energy Conversion with Emphasis on SOFC
||Phase Field Modelling of Microstructure and Conductivity Evolution of SOFC Electrodes
||Yinkai Lei, Tianle Cheng, Youhai Wen
|On-Site Speaker (Planned)
Understanding grain coarsening is important to mitigate the degradation of SOFC electrodes. In this work, we developed a phase field model to simulate the microstructure evolution of SOFC electrodes. The interfacial energy in this model can be easily tuned and two sets of energetic parameters for anode and cathode were developed respectively. Using these parameter sets, the contact angles at triple junctions in SOFC electrodes were calibrated and the grain coarsening of SOFC electrodes were investigated. The time evolution of TPB density, surface area density, grain size and tortuosity of different phases were analyzed. Furthermore, the bound charge successive approximation algorithm was used to calculate the effective conductivity of electrode at different time. The relation between the time evolution of microstructure and conductivity were discussed.
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